JPS6120119A - Information input tablet - Google Patents

Abstract

PURPOSE:To obtain an input tablet having high flexibility by loading output information corresponding to a replaceable character board from an upper device and storing the information in a code conversion RAM of the input tablet. CONSTITUTION:The upper device I sets up an address in the code conversion RAM22 of a command/data register 21 in the input tablet II on the basis of an I/O instruction outputted from a processor 11, and simultaneously sets up a non- maskable interruption FF23 to generate an interruption in a processor 24 of the input tablet II. The processor 24 executes an interruption processing program stored in a program memory 25, inputs said address data and stores the output data of the character board which correspond to the address data similarly in the RAM22. Said operation is repeated to store the output information of the mounted character board in said RAM22. Consequently, said output information can be loaded from the upper device I and converted at its code in the self- device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an input tablet having a plurality of convertible dials.

[Conventional technology]

For input tablets where the information to be input requires one item of many characters, such as a kanji input tablet, multiple dial boards with different character arrangements may be prepared depending on the type of industry, business, or ease of use for the operator. A method is used in which one is selected and set. Such an input tablet can be used to input characters.

A common method is to output item position information, ie, coordinates on a tablet, to a host device, and convert the coordinates into a character code or item code in the host device.

[Problem that the invention seeks to solve]

Conventional devices like this require a table in the host device to convert the tablet's position information into character codes.
The drawback is that it often occupies part of the memory of the host device.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an input tablet that can reduce the memory for conversion tables in a host device and reduce the load on the host device.

[Means for solving problems]

According to some inventions, the information @ (character code, item code) to be output corresponding to each dial board is loaded from the host device to the RAM in the input tablet, and the coordinates are converted into codes within the input tablet. An input tablet is obtained which is characterized in that it performs the following.

That is, the input tablet of the present invention includes an indicator rod for inputting the coordinate position i1 purple on the tablet, a plurality of convertible dial plates, and a code conversion RAM that stores output information corresponding to the dial plates. When converting a dial, output information corresponding to the dial can be loaded from a host device and code conversion can be performed within the device itself.

[Embodiments of the invention]

Next, the present invention will be described in detail with reference to the drawings showing one embodiment of the present invention.

In FIG. 1, a host device I receives an I from a processor 11
10 command sets the address Ki of the code conversion RAM 22 in the command/data register 21 of the input tablet. At the same time, non-maskable interrupt F/F 23'
e, a non-maskable interrupt is generated in the processor 24 of the input tablet (2). The processor 24 executes the interrupt processing program in the program memory 25 and receives address data from the code conversion RAM 22. Next, the output data of the dial corresponding to that address is similarly received from the host device (2) and stored in the code conversion RAM 22. By repeating the above operations, output information corresponding to the attached dial is stored in the code conversion RAM 22.

It is clear that depending on how the interrupt processing program is created, address auto-increment is also possible and the load time can be shortened.

In FIG. 2 showing a block diagram of an input tablet using an electromagnetic coupling method controlled by a processor, the processor 24 is
After sequentially updating the X address register f and Y address register g, scanning of the X and Y coordinates is repeated. When the magnetic pointer rod a is brought close to the dial in this state, an induced electromotive force is generated due to electromagnetic coupling, which passes through the detection circuit e and interrupt flip-flop i to generate an interrupt in the processor. Xj is the X address at the time the interrupt occurs, and Y is the X address.
If k is the code conversion R corresponding to the coordinates (Xj, Yk)
A code output buffer qK is output as a code corresponding to the data mj and ki input of AM22. Code change [(,A
The data of M22 is data loaded by the method shown in the embodiment of FIG. 1, and the internal nature of the data corresponds to that of the dial.

When replacing the entire dial plate, the VC can output a code corresponding to the new dial plate by loading the output information corresponding to the dial plate from the host device I.

Although the embodiments described above show examples using an input tablet of an electromagnetic coupling type, it is clear that the present invention can be similarly applied to capacitive coupling and other methods.

〔Effect of the invention〕

As explained above, the present invention provides an input tablet with excellent flexibility by loading output information corresponding to one replaceable dial from a host device and storing it in the code conversion RAM in the input tablet. I can do it.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram of an electromagnetically coupled human-powered tablet.

Claims (1)

[Claims] comprising an indicator rod for inputting coordinate positions on an input tablet, a plurality of replaceable dial plates removably provided on the tablet, and a code conversion RAM for storing output information corresponding to the dial plates; An information input tablet characterized in that output information corresponding to the dial is loaded from a host device into the code conversion RAM, and the coordinate position is converted into the output information within the own device.